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1·This avoids any gradual lateral enlargement of the pilot hole.

上述技巧可以避免导航孔逐渐向外侧扩大。

2·The valve face is provided with a pilot hole or a micro fixing valve.

阀面上 冲有导向孔或微型固阀。

3·First thing you want to do is drill a pilot hole in the right location.

第一件事，你想要做的就是钻一个先导孔在正确的位置。

4·Normally Open: When the coil is energized, the pilot hole closed, the valve chamber and pressurized by the piston return spring throttle thrust, the electromagnetic valve is closed.

常开：当线圈通电时，先导孔关闭，阀上腔由活塞节流孔增压和复位弹簧的推力，电磁阀关闭。

5·When the coil power, the pilot valve by the spring return, pilot hole closed throttle valve chamber pressurized by the piston return spring and thrust, the electromagnetic valve is closed.

当线圈断电时，先导阀芯靠弹簧复位，先导孔关闭，阀腔由活塞节流孔增压和复位弹簧的推力，电磁阀关闭。

6·When the coil power, the pilot valve by the spring return, pilot hole closed, the valve chamber and pressurized by the piston return spring throttle thrust, the electromagnetic valve is closed.

当线圈断电时，先导阀芯靠弹簧复位，先导孔关闭，阀上腔由活塞节流孔增压和复位弹簧的推力，电磁阀关闭。

7·When the coil power, the pilot valve by the spring return, pilot hole open, pressure relief valve on the chamber, the piston on the lower chamber medium pressure to promote the solenoid valve open.

当线圈断电时，先导阀芯靠弹簧复位，先导孔打开，阀上腔卸压，活塞靠下腔介质压力推动，电磁阀打开。

8·When the coil power, the pilot valve by the spring return, pilot hole open, pressure relief valve on the chamber, medium pressure piston push the lower chamber, the electromagnetic valve is opened.

当线圈断电时，先导阀芯靠弹簧复位，先导孔打开，阀上腔卸压，活塞靠下腔介质压力推动，电磁阀打开。

9·Set up a slant water hole at reamer, and connect the reamer and pilot with reducing synergy flute, which strengthen the cooling and washing function and ensure the bit's effects.

在扩眼体设一斜水眼，在导眼体与扩眼体之间连接一缩径增效排屑环，强化了冷却清洗作用，从而保证钻头有较好的使用效果。

10·Technique of free- water- carrying gas production with slim-hole coiled tubing was first successfully used in pilot - testing of horizontal well in middle region of Sichuan.

川中地区小口径连续油管携自由水采气工艺技术，首次成功地在水平井中先导试验，提高了低产气井开采效果。